diff --git a/dev.sh b/dev.sh
new file mode 100755
index 0000000..2a7b103
--- /dev/null
+++ b/dev.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+echo "========================================="
+echo " Starting DEVELOPMENT WATCH mode..."
+echo "========================================="
+echo "Press Ctrl+C to stop."
+echo ""
+
+echo "[DEV] Starting Tailwind CSS watcher..."
+tailwindcss -i ./frontend/input.css -o ./web/static/css/output.css --watch &
+TAILWIND_PID=$!
+
+echo "[DEV] Starting JavaScript watcher with Code Splitting..."
+esbuild ./frontend/js/main.js \
+  --bundle \
+  --outdir=./web/static/js \
+  --splitting \
+  --format=esm \
+  --watch &
+ESBUILD_PID=$!
+
+trap "kill $TAILWIND_PID $ESBUILD_PID 2>/dev/null" EXIT
+
+wait